Q: Is 421,680 a Prime Number?
A: No, 421,680 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 421680 can be evenly divided by 1 2 3 4 5 6 7 8 10 12 14 15 16 20 21 24 28 30 35 40 42 48 56 60 70 80 84 105 112 120 140 168 210 240 251 280 336 420 502 560 753 840 1,004 1,255 1,506 1,680 1,757 2,008 2,510 3,012 3,514 3,765 4,016 5,020 5,271 6,024 7,028 7,530 8,785 10,040 10,542 12,048 14,056 15,060 17,570 20,080 21,084 26,355 28,112 30,120 35,140 42,168 52,710 60,240 70,280 84,336 105,420 140,560 210,840 and 421,680, with no remainder.
Since 421,680 cannot be divided by just 1 and 421,680, it is not a prime number.